Benlowes-a Cleveland with more poetry and less cleverness, or a very much weaker Crashaw-uses a monorhymed triplet made up of a heroic, an octosyllable, and an Alexandrine which is as wilfully odd as the rest of him.
"A History of English Literature Elizabethan Literature"
George Saintsbury
But after the three poets just mentioned, the Alexandrine became invariable; the decasyllable being left for light and occasional work, as a sort of medium in usage as in bulk between the Alexandrine and the octosyllable.
"A Short History of French Literature"
George Saintsbury
This is couched in alternate three and five accent iambics, preparing a delicious rhythmic effect when the metre changes, in the invocation, to the octosyllable, with or without anacrusis.
"Minor Poems by Milton"
John Milton